Problem: Images files can store license data as meta data inside the file. As of today image files do not provide this data. For nearly all files on Wikimedia Commons license data are available on commons. But they are stored separately on the description page.
Who would benefit: Users of Wikimedia Commons files who want to use the file and need the license information but cannot find the corresponding Wikimedia Commons file page.
Proposed solution: Write license data from description page into meta data of the image file.
I'm surprised nobody has requested this before. It sounds like a great idea. Is there some reason this has not been done yet? Downtowngal (talk) 00:09, 17 November 2017 (UTC)Reply[reply]
This is not the first time I've heard this proposal. I would like to limit the scope to only the thumbnails. Original files shouldn't be touched. That would have all sorts of nasty side effects (duplicate detection broken to name one). Multichill (talk) 17:10, 17 November 2017 (UTC)Reply[reply]
Strong oppose I see a lot of problems for bot maintainers and mass uploaders. By writing the license into the image, the file content would be changed which causes a different SHA-1 checksum of the file. This checksum is needed in lots of automatic upload processes to check if this file already exists on commons. If the file was altered this check would not be possible anymore. As a consequence this would cause a lot of redundant uploads. --Freddy2001talk 21:52, 30 November 2017 (UTC)Reply[reply]
Oppose as proposed. I'm concerned that new editors who don't understand our licensing requirements will unintentionally be embedding wrong license information into the image. This could dramatically undermine our abilities to determine the true source and license of the image. Also, one of the classic ways to begin to see a problem with an upload is whether there is metadata or not. If there isn't, chances are it hasn't come from the editor's camera, and thus any self release licenses are likely invalid. I also share Freddy2001's concerns. This should not be implemented. --Hammersoft (talk) 18:24, 4 December 2017 (UTC)Reply[reply]
Oppose I think, the license info should be added before the image is uploaded to Commons. Snek01 (talk) 21:16, 6 December 2017 (UTC)Reply[reply]